
def getZhiYinShu(num):
    res = []
    for i in range(2,num):
        if num%i==0 and isZhiShu(i):
            res.append(str(i))
    return res

def isZhiShu(num):
    flag = True
    for i in range(2,num):
        if num % i == 0:
            flag = False
            break
    return flag

if __name__=="__main__":
    for i in range(2,100):
        zhiyinshuLst = getZhiYinShu(i)
        if len(zhiyinshuLst)<=0:
            continue
        print(f"{i}={'*'.join(zhiyinshuLst)}")